CN201051743Y - A novel wave division multiplexing system - Google Patents
A novel wave division multiplexing system Download PDFInfo
- Publication number
- CN201051743Y CN201051743Y CNU2007200664690U CN200720066469U CN201051743Y CN 201051743 Y CN201051743 Y CN 201051743Y CN U2007200664690 U CNU2007200664690 U CN U2007200664690U CN 200720066469 U CN200720066469 U CN 200720066469U CN 201051743 Y CN201051743 Y CN 201051743Y
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- light
- wavelength
- optical
- division multiplex
- division multiplexing
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Abstract
The utility model relates to a novel wavelength-division multiplex system, which comprises an auto-excitation transmitting light source, an optical circulator, a light wavelength-division multiplex device, a light wave decomposition multiplexer, a plurality of light transmitting machines, a plurality of light receiving machines, and a laser device. The output terminal of the auto-excitation transmitting light source is connected to the first terminal of the light circulator whose second terminal is connected to the input terminal of the light wavelength-division multiplex device and the third terminal is connected to the input terminal of the light wave decomposition multiplexer, the output terminal of the light wavelength-division multiplex is connected to the light transmitting machines, the output terminal of the light wave decomposition multiplexer is connected to the light receiving machines, and the laser device is arranged in the light transmitting machine. Compared with the prior arts, the utility model has the advantages of simple design, and low cost, and the cost of the entire light source system is one tenth of the original one, and the utility model is extremely applicable to employment of optical fiber to the home.
Description
Technical field
The utility model relates to the optical communication technique field, particularly relates to a kind of novel wavelength-division multiplex system.
Background technology
In present backbone network and optical fibre for metropolitan area network link, mainly be to adopt wavelength division multiplexing (WDM) technology.Be that the close wavelength-division multiplex technology or the light source of Coarse Wavelength Division Multiplexing technology all are the lasers that adopts single longitudinal mode.Distributed Feedback (DFB) laser by general use in backbone network and metropolitan area network, but distributed Feedback (DFB) laser for the spectrum that produces single-frequency need be on laser etched grating, need to increase Temperature Feedback control simultaneously, so whole light source system cost height, design is complicated, can't be used in the Access Network.
Summary of the invention
The purpose of this utility model is exactly to provide a kind of novel cheaply wavelength-division multiplex system for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of novel wavelength-division multiplex system, it is characterized in that, comprise the self-excitation transmitting illuminant, optical circulator, light wavelength division multiplexing, light wave decomposition multiplex device, some optical senders, some optical receivers, laser, the output of described self-excitation transmitting illuminant is connected with first end of optical circulator, second end of described optical circulator is connected with the input of light wavelength division multiplexing, its the 3rd end is connected with the input of light wave decomposition multiplex device, the output of described light wavelength division multiplexing is connected with some optical senders, the output of described light wave decomposition multiplex device is connected with some optical receivers, and described laser is located in some optical senders.
Also comprise the light adjustable attenuator, described self-excitation transmitting illuminant is connected with first end of optical circulator by the light adjustable attenuator.
Described self-excitation transmitting illuminant is an ASE self-excitation transmitting illuminant.
Described light wavelength division multiplexing is an array waveguide grating.
Described light wave decomposition multiplex device is an array waveguide grating.
Described laser is the FP laser.
Compared with prior art, the utility model simplicity of design, cost are low, and the cost of whole light source system is original 1/10th, are highly suitable for to promote the use of during Fiber to the home.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a self-excitation emission spectrum schematic diagram;
Fig. 3 is that the output spectrum of FP laser changes schematic diagram.
Wherein: 1-self-excitation transmitting illuminant, 2-light adjustable attenuator, 3-optical circulator, 4-light wavelength division multiplexing, 5-optical sender, 6-optical receiver, 7-light wave decomposition multiplex device.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 3, a kind of novel wavelength-division multiplex system, comprise self-excitation transmitting illuminant 1, optical circulator 3, light wavelength division multiplexing 4, light wave decomposition multiplex device 7, some optical senders 5, some optical receivers 6, laser, the output of described self-excitation transmitting illuminant 1 is connected with first end of optical circulator 3, second end of described optical circulator 3 is connected with the input of light wavelength division multiplexing 4, its the 3rd end is connected with the input of light wave decomposition multiplex device 7, the output of described light wavelength division multiplexing 4 is connected with some optical senders 5, the output of described light wave decomposition multiplex device 7 is connected with some optical receivers 6, and described laser is located at some optical senders interior 5.
Also comprise light adjustable attenuator 2, described self-excitation transmitting illuminant 1 is connected with first end of optical circulator 3 by light adjustable attenuator 2; Described self-excitation transmitting illuminant 1 is an ASE self-excitation transmitting illuminant; Described light wavelength division multiplexing 4 is an array waveguide grating; Described light wave decomposition multiplex device 7 is an array waveguide grating; Described laser is the FP laser.
Present embodiment mainly comprises the self-excitation transmitting illuminant, the light adjustable attenuator, and optical circulator, light wavelength division multiplexing, light wave decomposition multiplex device, optical sender, seven parts such as optical receiver are formed.
The self-excitation transmitting illuminant of output ASE spectrum, it is the self-excitation radiating light source of high-output power, spectral width at C Band from 1525nm to 1565nm.Power spectral density is greater than-10dBm/0.5nm.Main effect is to provide the excitation light intensity to the laser based on the FP chamber in the optical sender, makes certain longitudinal mode of FP laser be subjected to the excitation of outside light intensity, produces the spectral characteristic of the laser of similar DFB then.
The light adjustable attenuator, its adjustable extent is 0dB～40dB, mainly is the injection light intensity of regulating laser.
Optical circulator, it is a kind of optical passive component, mainly is that effect is to allow light path change direction.The light signal of the light source of self-excitation radiation enters by wavelength division multiplex device by circulator and to enter optical sender.The light signal of optical sender changes over to by optical circulator in the optical fiber of trunk through behind the light wavelength division multiplexing.
Light wavelength division multiplexing device, this project adopts array waveguide grating as light wavelength division multiplexing device, the wavelength channel number is 40, channel spacing is 0.8nm, it mainly acts on is that spectrum with self-excitation emission is divided into different wavelength period (as Fig. 2), the spectrum width of each power block is at 0.2nm, and light intensity is about-13dBm.
When the power block of the different wave length of ASE light source provides outside gain for F-P, the output spectrum of F-P just changes as Fig. 3, certain longitudinal mode will be enhanced in many longitudinal modes of output at this time, other longitudinal modes are with weakened, the spectrum (dotted line among Fig. 3) that similar Distributed Feedback Laser occurs, spectrum extinction ratio at this time is at 10dB, and side mode suppression ratio satisfies the requirement of wavelength-division multiplex system to light source more than 25dB.
Wavelength division multiplexer is simultaneously with a plurality of longitudinal mode eliminations of FP laser, and the only remaining single longitudinal mode transmitting optical signal of each channel converges the light signal of different wavelength in the optical fiber.
Optical sender, its effect are that the signal of telecommunication with Ethernet is modulated in the Optical Fiber Transmission.It is an active device, and its LASER Light Source mainly is to adopt many longitudinal modes F-P laser with low cost, do not have the exterior light injection fashionable spectrum all the wavelength spacing of basic identical each longitudinal mode be 0.8nm, the luminous intensity of each longitudinal mode is approximately-16～-18dBm,
Optical receiver, it mainly is the signal of telecommunication that the conversion of signals of optical fiber is become Ethernet.
The optical wavelength demodulation multiplexer, it is paired use with wavelength multiplexer, and what this patent adopted is array waveguide grating, and its wavelength interval is 0.8nm, 40 fiber channels.Significant feature is to decompose out with the wavelength optical signals of transmitting on the optical fiber with single, enters respectively in the corresponding optical receiver.
Claims (6)
1. novel wavelength-division multiplex system, it is characterized in that, comprise the self-excitation transmitting illuminant, optical circulator, light wavelength division multiplexing, light wave decomposition multiplex device, some optical senders, some optical receivers, laser, the output of described self-excitation transmitting illuminant is connected with first end of optical circulator, second end of described optical circulator is connected with the input of light wavelength division multiplexing, its the 3rd end is connected with the input of light wave decomposition multiplex device, the output of described light wavelength division multiplexing is connected with some optical senders, the output of described light wave decomposition multiplex device is connected with some optical receivers, and described laser is located in some optical senders.
2. a kind of novel wavelength-division multiplex system according to claim 1 is characterized in that, also comprises the light adjustable attenuator, and described self-excitation transmitting illuminant is connected with first end of optical circulator by the light adjustable attenuator.
3. a kind of novel wavelength-division multiplex system according to claim 1 is characterized in that, described self-excitation transmitting illuminant is an ASE self-excitation transmitting illuminant.
4. a kind of novel wavelength-division multiplex system according to claim 1 is characterized in that described light wavelength division multiplexing is an array waveguide grating.
5. a kind of novel wavelength-division multiplex system according to claim 1 is characterized in that, described light wave decomposition multiplex device is an array waveguide grating.
6. a kind of novel wavelength-division multiplex system according to claim 1 is characterized in that described laser is the FP laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200664690U CN201051743Y (en) | 2007-01-18 | 2007-01-18 | A novel wave division multiplexing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200664690U CN201051743Y (en) | 2007-01-18 | 2007-01-18 | A novel wave division multiplexing system |
Publications (1)
| Publication Number | Publication Date |
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| CN201051743Y true CN201051743Y (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200664690U Expired - Fee Related CN201051743Y (en) | 2007-01-18 | 2007-01-18 | A novel wave division multiplexing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114285469A (en) * | 2021-11-16 | 2022-04-05 | 武汉永鼎光通科技有限公司 | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof |
-
2007
- 2007-01-18 CN CNU2007200664690U patent/CN201051743Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114285469A (en) * | 2021-11-16 | 2022-04-05 | 武汉永鼎光通科技有限公司 | Low-cost 400G optical module for short-distance high-speed transmission and optical modulation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 |